Treatment of Contemporary Mexican Americans in Selected Fifth Grade Social Studies Textbooks

Statement of the Problem The purpose of this study was to content analyze thirty fifth grade social studies textbooks to determine the treatment that these books gave to contemporary Mexican Americans

Characterizing the deformation response of a unidirectional non-crimp fabric for the development of computational draping simulation models

In several countries around the world, including Canada, government incentives have been put in place to improve the fuel efficiency of vehicles and reduce CO2 emissions. Improvements in composites manufacturing technology, such as high-pressure resin transfer molding and quick curing resins, makes it practical to lightweight through the incorporation of carbon fiber reinforced polymer (CFRP) parts into the body-in-white structure of vehicles. However, the technology has only been realized for small production rates and is currently in the developmental phase towards full automation for high-volume production. Hence, there is a need to developed and calibrate fabric draping simulations models to support this effort and enable the design of CFRP production processes that incorporate cost-effective fabric reinforcement material, such as heavy tow unidirectional non-crimp fabric (UD-NCF). This work aimed to expand the understanding of the forming behaviour of UD-NCFs, within the context of the development of automation capabilities for fabric preforming. The investigation focused on the characterization of the macroscale response of a UD-NCF, including an investigating of associated local deformation mechanisms, to calibrate a macroscale constitutive model and support the development of a computational fabric draping simulation model. The fabric characterization consisted of a series of experimental tests that measured the fabric in-plane and out-of-plane deformation responses reminiscent of draping operations. The tests were conducted with respect to the carbon fiber (CF) tow longitudinal and transverse directions. The experimental tests conducted were the longitudinal, transverse, and off-axis extension tests; the picture frame test (PFT); the cantilever; and friction sliding test in both material directions. The longitudinal extension and bending stiffness were found to be significantly higher than the respective transverse extension and bending stiffnesses. Also, at low strains, the fabric transverse extension stiffness was found to be negligible until crimping in the transverse glass fibers was removed. Regarding the fabric friction response, the coefficients of friction were higher on the stitching fabric side and when sliding occurred in the longitudinal fabric direction. Also, an investigation of the fabric mesoscale deformation mechanisms revealed the generation of CF tow undulations and intertow gapping, mainly generated by deformation of the stitching, when the fabric was subjected to transverse extension and shear deformations. To address difficulties associated with sliding of the glass fibers at the clamps during extension and PFT testing a clamping design was proposed that fully restrained the glass fibers, while at the same time preventing specimen damage at the grips. 2D DIC was used to study the development of strains in the fabric during all in-plane experimental tests. Challenges associated with fabric surface texturization and strain measurements through digital image correlation were investigated and addressed to improve the optical strain analysis. A surface texturization technique with an oil-based paint was implemented in all tests as it created high contrast speckle patterns on the fabric surface and the least amount of fabric deformation interference when compared with two other surface texturization techniques. Using the experimental results, a macroscale material model, chosen from the existing material model library available in the commercial finite element software LS-DYNA® was calibrated to simulate forming operations. The material model was calibrated for in-plane and out-of-plane deformation modes in accordance with the experimental tests conducted. The material model parameters were identified by simulating the experimental tests conducted during the fabric characterization process and an iterative inverse parameter identification approach until a good correlation was obtained between the numerical simulations and the corresponding physical tests. In most cases, piecewise linear functions were used to approximate the experimental test data before entering into the material model. Finally, to validate the calibration of the material model, a single-layer 100-mm diameter hemispherical test with a displacement controlled punch was performed and simulated using the calibrated material model. In addition to the calibrated material model, results from the friction tests were used to define contact boundary conditions in the draping simulation model. A good agreement was obtained between the simulation predictions of macroscopic deformations observed in the fabric, including contour shape and wrinkling, and the experimental results

Robust and efficient geometric primitive detection in 3D point clouds(3次元点群における頑健かつ効率的な幾何プリミティブ検出)

信州大学(Shinshu university)博士（工学）この博士論文は、次の学術雑誌論文を一部に使用しています。IIEEJ Transactions on Image Electronics and Visual Computing. 8（2）:121-135 (2020). © 2020 IIEEJ.IIEEJ Transactions on Image Electronics and Visual Computing. 7（2）:67-77 (2019). © 2019 IIEEJ.IIEEJ Transactions on Image Electronics and Visual Computing. 5（2）:60-73 (2017); doi:10.11371/tievciieej.5.2_60. © 2017 IIEEJ.ThesisSANDOVAL GALVEZ JAIME ALBERTO. Robust and efficient geometric primitive detection in 3D point clouds(3次元点群における頑健かつ効率的な幾何プリミティブ検出). 信州大学, 2020, 博士論文. 博士（工学）, 甲第742号, 令和02年09月30日授与.doctoral thesi

Peak to average power ratio reduction and error control in MIMO-OFDM HARQ System

Currently, multiple-input multiple-output orthogonal frequency division multiplexing (MIMOOFDM) systems underlie crucial wireless communication systems such as commercial 4G and 5G networks, tactical communication, and interoperable Public Safety communications. However, one drawback arising from OFDM modulation is its resulting high peak-to-average power ratio (PAPR). This problem increases with an increase in the number of transmit antennas. In this work, a new hybrid PAPR reduction technique is proposed for space-time block coding (STBC) MIMO-OFDM systems that combine the coding capabilities to PAPR reduction methods, while leveraging the new degree of freedom provided by the presence of multiple transmit chairs (MIMO). In the first part, we presented an extensive literature review of PAPR reduction techniques for OFDM and MIMO-OFDM systems. The work developed a PAPR reduction technique taxonomy, and analyzed the motivations for reducing the PAPR in current communication systems, emphasizing two important motivations such as power savings and coverage gain. In the tax onomy presented here, we include a new category, namely, hybrid techniques. Additionally, we drew a conclusion regarding the importance of hybrid PAPR reduction techniques. In the second part, we studied the effect of forward error correction (FEC) codes on the PAPR for the coded OFDM (COFDM) system. We simulated and compared the CCDF of the PAPR and its relationship with the autocorrelation of the COFDM signal before the inverse fast Fourier transform (IFFT) block. This allows to conclude on the main characteristics of the codes that generate high peaks in the COFDM signal, and therefore, the optimal parameters in order to reduce PAPR. We emphasize our study in FEC codes as linear block codes, and convolutional codes. Finally, we proposed a new hybrid PAPR reduction technique for an STBC MIMO-OFDM system, in which the convolutional code is optimized to avoid PAPR degradation, which also combines successive suboptimal cross-antenna rotation and inversion (SS-CARI) and iterative modified companding and filtering schemes. The new method permits to obtain a significant net gain for the system, i.e., considerable PAPR reduction, bit error rate (BER) gain as compared to the basic MIMO-OFDM system, low complexity, and reduced spectral splatter. The new hybrid technique was extensively evaluated by simulation, and the complementary cumulative distribution function (CCDF), the BER, and the power spectral density (PSD) were compared to the original STBC MIMO-OFDM signal

Informalidad partidaria y mediaciones entre dirigentes y militantes en México: los casos del PAN, el PRI, el PRD y MORENA

Objective: this article aims to demonstrate the informal logistics within the political parties in Mexico. It is understood as a mechanism of mediation between militants and leaders. Methodology: from a qualitative approach, the role of informality in the Institutional Revolutionary Party (PRI), the National Action Party (PAN), the Party of the Democratic Revolution (PRD), and the National Regeneration Movement (MORENA) was explored. Results: informality was found to be of vital importance, in some cases, its absence is a sign of internal polarization (PAN); in other cases, it supports the existence of agreements beyond what is established in the Statutes (PRI). In a few more cases, the fractional reality of the organization (PRD) is shown. Conclusions: informality can illustrate the discretionary role of certain leadership, as well as the implementation of strategies that contravene electoral legislation in order to maintain an advantage over potential competitors (MORENA).Objetivo: el artículo propone evidenciar la lógica informal al interior de los partidos políticos en México, entendida como un mecanismo de mediación entre militantes y dirigentes. Metodología: desde una aproximación cualitativa, se exploró el rol de la informalidad en el Partido Revolucionario Institucional (PRI), el Partido Acción Nacional (PAN), el Partido de la Revolución Democrática (PRD), y Movimiento Regeneración Nacional (MORENA). Resultados: se encontró que la informalidad es de vital importancia, ya que, en algunos casos, su ausencia es signo de polarización interna (PAN); en otros, da evidencia de la existencia de acuerdos más allá de lo establecido en los estatutos (PRI). En algunos más, se muestra la realidad fraccionada de la organización (PRD). Conclusiones: la informalidad puede ilustrar el papel discrecional de ciertos liderazgos, así como la adopción de estrategias que contravienen la legislación electoral en aras de mantener ventaja sobre los posibles competidores (MORENA)

Urbanization and social classes. The experience of inequality in the organization of the metropolitan area of Asunción

El área metropolitana de Asunción (AMA) ha experimentado un acelerado y desorganizado proceso de urbanización, debido a la instauración de un marco institucional y normativo facilitador del mercado y desregulador del planeamiento territorial, propiciando que actores sociales dominantes consigan imponer sus intereses, y usufructuar sus réditos, socializando los impactos negativos que estos provocan. El objetivo principal de este estudio es, por lo tanto, exponer las características de la relación entre la estructura social y la experiencia urbana de los habitantes del área metropolitana asuncena. La metodología utilizada es predominantemente cualitativa, en tanto se retoman las reflexiones de los habitantes del AMA, según su posicionamiento en la estructura social paraguaya, respecto a las representaciones subjetivas sobre la experiencia cotidiana de la residencia urbana. De manera complementaria, se analizan estadísticas oficiales de indicadores relativos al objeto de estudio. Los principales hallazgos permiten constatar las contradicciones que se gestan en el seno del proceso de urbanización del AMA, en el cual se revelan los antagonismos que emergen en una sociedad que pretende apuntalar el desarrollo urbano desde el mercado, dando cuenta de que el posicionamiento de los habitantes en la estructuración social posee directa incidencia en las posibilidades de satisfacción de sus demandas como del usufructo de las potencialidades citadinas.The Metropolitan Area of Asunción (AMA) has experienced an accelerated and disorganized process of urbanization due to the establishment of a normative and institutional framework that facilitates the market and deregulates territorial planning, promoting domineering social actors to impose their interests and to profit from their revenues, socializing the negative impacts that they cause. The main objective of this work is therefore to expose the characteristics of the connection between the social structure and the urban experience of the inhabitants of the metropolitan area of Asuncion. The methodology is predominantly qualitative, since the reflections of the inhabitants of the AMA are taken up, according to their position in the Paraguayan social structure, regarding the subjective representations about the daily experience of urban residence. Additionally, official statistics of indicators related to the object of study are analyzed. The main findings confirm the contradictions that arise within the urbanization process of the AMA, in which the antagonisms that emerge in a society that aims to strengthen the urban development from the market are revealed, demonstrating that the position of the inhabitants in the social structure has a direct impact on the possibilities of satisfying their demands as well as the usufruct of the city potentialities

Aplicación de prácticas de laboratorio sobre el contenido de electromagnetismo, en el proceso de aprendizaje de los estudiantes de undécimo grado, en el colegio Rafael María Fabretto Michely, durante el segundo semestre del año dos mil doce

La enseñanza de las ciencias debe ocurrir en un espacio donde las estrategias generen en los estudiantes el potenciar las capacidades para pensar y decidir autónomamente, lo cual implica que éste adquiera los instrumentos y las herramientas cognoscitivas necesarias para participar en la transformación de su entorno. Dentro de este contexto,el docente juega un papel sumamente importante al seleccionar las estrategias metodológicas que apoyen, motiven e impulsen a los estudiantes a vencer los obstáculos en el proceso de aprendizaje, atendiendo las diferencias individuales que cada estudiante posee al adquirir o procesar lainformación. En este sentido, esta investigación tiene como propósito contribuir a la mejora del proceso de aprendizaje de los estudiantes de undécimo grado al desarrollar la unidad de electromagnetismo, tomando como estrategia metodológica la experimentación con materiales del medio, donde sin un laboratorio el educador puede capacitar a los estudiantes en el proceso educativo de esta temática. Este estudio de investigación abarca seis capítulos, el primer capítulo comprende el planteamiento de la situación problemática y la definición respectiva mediante su formulación, también se presentan los antecedentes nacionales o internacionales de estudios similares al nuestro, finalmente se formulan los objetivos que se constituyen en la líneas directrices durante todo el proceso de la investigación; el segundo es el fundamento teórico que los diversos científicos brindan para estudios posteriores y que en nuestro caso sustenta y valida nuestros hallazgos y conclusiones; en el tercero, se desarrolla y exponen los diversos métodos, instrumentos y técnicas a las cuales recurrimos para recolectar,organizar y analizar los datos; en el cuarto, se presentan y discuten los resultados a la luz de las diversas teorías científicas; en el quinto se declaran las conclusiones a las cuales hemos arribado y se anotan algunas sugerencias que surgen como consecuencia del trabajo a lo largo del proceso investigativo, finalmente en el sexto nos referimos al soporte bibliográfic

Las áreas naturales protegidas y la tenencia agrícola de la tierra: caso parque nacional nevado de Toluca

el análisis de las actividades clandestinas y las acciones gubernamentales que se han ejercido. También muestra como las localidades, se encuentran estructuradas en las actividades económicas y como han generado presión en masa forestal en el Nevado de Toluca por las actividades clandestinas generadas por los habitantes para complementar sus ingresos. Y por último se hace mención de las Políticas y programas de Conservación planificadas para el Área de Protección de Flora y Fauna del Parque Nevado de Toluca a través de la subzonificación de sus espacios y aprovechamientos ecoturisticos.tiene como objetivo dar a conocer una descripción del Parque Nacional Nevado de Toluca, mostrando las 23 localidades dentro del mismo, de esta manera se muestran las políticas de sustentabilidad y de la agricultura, por lo que se mencionan diversos conceptos de intercambios de los bienes y servicios ambientales

Modelo de gestión basado en la administración del servicio de TI para garantizar la disponibilidad de los servicios tecnológicos hacia los clientes externos mejorando su calidad en las entidades financieras de cajas municipales de la región Piura

La presente investigación tiene como objetivo proponer e implementar el modelo gestión basado en la administración del servicio de TI para mejorar la calidad del servicio en las entidades financieras Cajas Municipales de la región Piura. Se propone adaptar un modelo de gestión y buenas prácticas de la administración de servicios de TI mediante la integración de modelos que brinda mejores prácticas como es ITIL con la ISO/20000 teniendo como finalidad implementar procesos en la gestión de servicios, aplicando marco de trabajo de las mejores prácticas destinadas a facilitar la entrega de servicios de tecnologías de la información de alta calidad a los clientes internos y externos de las entidades financieras